feat: show the travel name above the mailing list

src/Service/TravelIndex.php

@@ -109,6 +109,24 @@ class TravelIndex
         }
     }
 
+    /**
+     * Resolve a date code to its travel label, e.g. "Davos - Sportclub Waldschlössli - Wochenende".
+     *
+     * @param string $dateCode The date code to resolve
+     *
+     * @return string|null The label, or null if the code is not found or the travel has none
+     */
+    public function mapDateCodeToLabel(string $dateCode): ?string
+    {
+        $dateId = $this->mapDateCodeToId($dateCode);
+
+        if (null === $dateId) {
+            return null;
+        }
+
+        return $this->generateFilesMap()[$dateId]['label'] ?? null;
+    }
+
     /**
      * Convert a hotel code string to its corresponding hotel ID.
      *